history
From Yan Shu's (晏殊) Song ci 《蝶恋花》: 昨夜西风凋碧树,独上高楼,望尽天涯路。 - 'Last night the west wind withered the emerald trees; alone I climb the high tower, gazing to the end of the horizon road.' Wang Guowei in 《人间词话》 appropriated these three lines as the FIRST of three 'stages of great endeavor', the stage of lonely, searching vision that precedes any true effort.
usage
Literary and slightly melancholic. Always part of the trio 昨夜西风凋碧树,独上高楼,望尽天涯路. Invoked in essays on scholarship, searching, and long journeys.